Upstream signal quality monitoring
US7944848B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 2008 |
| Grant date | May 17, 2011 |
| Priority date | — |
| Expiry date | May 12, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L43/045
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The problem is that a measurement of the average signal quality (average modulation error ratio), does not identify poor quality signals that may be originating from an individual cable modem. The device of the present invention displays the modulation error ratio (MER) for each packet received. Since the media access control (MAC) address is associated with a packet received from an individual cable modem, a graph displaying the MER for each packet received is also displaying the MER for signals from the individual cable modems. Thus a technician viewing the display will be able to identify whether a low MER is a result of an impairment in the network or the from an individual cable modem.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.